Rotary pump.



2 SHEETS-*SHEET 1 Patented Nov. 25, 1913. Y

J. a, KIHNEY.

v ROTARY PUMP.

' ilPPLIflATIDH I'ILED'DEO. 9, 1912.

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J. R. KINNEY.

ROTARY PUMP.

APPLICATION FILED DEC. 9, 1912.

1,079,560. Patented Nov. 25, 1913.

2 SHVEETSSHBET 2 Wbwsscs: J hgzijenjnr:

5% us s? 62mg @444", I 8 i i JUSTUS R. KINNEY, OF "DORCHESTER,MASSACHUSETTS.

ROTARY PUMP.

Specification of Letters Patent. Application filed December 9, 1912.

Patented Nov. 25, 1913. Serial No. 736.203.

To all whom it may concern Be it known that I, JUsTUs R. KINNEY, acitizen of the United States of America, and a resident of Dorchester,in the countyof Suffolk and State of Massachusetts, have inventedcertain new and useful Improve ments in Rotary Pumps, of which thefollowing is a specification.-

This invention relates to rotary umps and has for its object theprovision 0 a de-' vice of this character that will operate smoothly andeffectively, and at the same time be simple in construction, havingcomparatively few operating parts, the particular object of theinvention being to provide a means for lubricating the operating partsby means of the fluid being pumped.

This invention is an improvement on pumps shown and described in twoother applications of mine filed 17, 1913, and numbered761,560.

The invention consists in a rotary eccentric piston having mountedthereon an an- The invention further consists in providing theoscillating slotted member with grooves communicating with its slotthereby of the guide brackets upon their supporting therein.

The invention further consists in providing said annular member withpassages extending from end to end thereof, thus permitting an equalpressure on the side of said annular member.

The invention further consists of means for obviating all end thrust onthe piston shaft.

The invention consists also in providing the bearing surfaces for saidoscillating slotted member with lubricating grooves adapted to containfluid under pressure.

The invention consists further in certain novel features of constructionand arrangestood by reference to the description of the respectivelyJuly 18, 1912, and numbered 710,255,v and April one point in its in saidfigure.

readily nnderdrawings and to the claims hereinafter given.

Of the drawings: Figure 1 represents a vertical section of a pumpembodying the principles of the present invention. Fig. 2 represents alongitudinal vertical section of the same, the cutting plane being online 2-2 on Fig. 1, and Fig. 3 represents a partial section, the cuttingplane being on line 33 on Fig. 1.

Similar characters designate like parts throughout the several figuresof the drawlngs.

In the drawings, 10 represents a casing supported by the feet 11 andhaving a cylindrical piston chamber .12 and the inlet and outletcompartments 13 and 1&1 respectively. A passage 15 forms a means ofcommunication between the inlet compartment 13 and the piston chamber 12while a similar passage 16 forms a means of communication between thepiston chamber and theoutlet compartment. Extending through the pistonchamber 12 is a shaft 17 revoluble in bearings 18 in the end plates 19secured tothe casing 10. The shaft 17 has secured thereto within thepiston chamber 12 two eccentrics 20, these two eccentrics beingseparated by the divisional wali 21. The eccentrics 20 are keyed to theshaft 17 and revolve therewith. Upon each of the eccentrics, is mountedan annular piston member 22 which is adapted to always contact atperiphery with the cylindrical wall of said piston chamber during therotation of the shaft 17.

Between the inlet and outlet compartments 13 and 14 is an. abutment 23the inner end 23 of which is slightly outside of the cylindrical wall ofthe piston chamber 12. In this; abutment 22 is formed a cylindricalchamber 24 in which are mounted the oscillating members 25, the outerends of which are positioned in recesses 26 in the end plates 19 asshown in Fig. 2, while their inner ends abut each other as shown Each ofthe oscillating members 25 has a diametrical slot 27 therethrough towhich is accurately fitted "the blade 28 rigidly secured to the pistonmember 22. The periphery of each oscillating member 25 contacts 'withthe cylindrical wall of thepiston chamber 12 so that the piston member22 just clears said-member 25 as the former rotates in the cham- 7 her12. During the rotation of the piston member 22 the blade 2S-Willreciprocate in the slot 27 and at the same time oscillate about the axisof the member 25.

The walls of the chamber 24 extend downwardly to a point that the outerfaces of said blade 28 will reach in-eitherdirection during theoscillation thereof. The space between the piston chamber 12 and the end23 =of the abutment 23 provides a means for preventing the pocketing ofany of the material in the chamber 12 as the piston 22 revolves. Thecylindrical opening 24 opens at the top into the fluid compartment 29communicating .by means of the passage 30 with the outlet compartment14, this passage 30 being shown only in dotted lines in Fig. 1 of thedrawings. It is obvious that as a result of this opening between theoutlet compartment 14: and the fluid compartment 29 the fluid containedwithin this compartment 29 will be at all. times under the same pressureas that contained in the outlet compartment 14.

Each bearing wall for the oscillating member 25 has cut therein a groove31, the one on the inlet side of the pump extending only part Way downthe wall, as indicated in Fig. 1 of the drawings, while the other opensinto the piston chamber 12. As a result of these passages 31 the fluidunder pressure is admitted thereto and is forced by means of thecontinued pressure thereon longitudinally of said oscillating member 25.to thoroughly lubricate the same, and thereby permit. it to oscillatewith more freedom, the tendency being to cause said oscillating memberto be supported by a thin film of 'fluid under pressure. In a likemanner, each side wall of the slot 27 is provided with a groove 32extendin trans- 've'rsely thereof, the slot on the discharge sideextending from end to end of said slotwhile the one on the inlet sideextends only part way thereof, as shown in Fig. 1 of the drawings. Bythis construction fluid under pressure is admitted to either side of theblade 28, thereby thoroughly lubricating the blade, the fluid in theslots 32 bein forced laterally therefrom between the b ade 28 and theside walls of said slot 27, so that the blade will reciprocate betweentwo thin films of fluid under pressure.

To prevent fluid from leaking by one end of the annular member 22 andcreating an undue pressure on one face thereof, each annular member isprovided with a plurality of openings 33 extending from end to end andcommunicating with annular grooves 34 in either end thereof. By thisconstruction in case any liquid is forced between the end of an annularmember and its abutting side wall, it is free to pass through theopenings 33 into the opposite annular groove 34: and thus equalize thepressure on the opposite ends of said annular member. It is quiteobvious that by means of this construction more freedom of movement ispossible for said annular member during the rotation of the shaft 17 andits eccentric 20. ,The inner wall of each annular member- 22 is providedwith the annular groove 35 which communicates by means of a passage 36,extending through said annular member adjacent to the blade '28, withthe outlet compartment 14. This provides a means whereby the fluid underpressure is permitted to pass through said passage 36 into the annulargroove 35, and this fluid will be forced by means of the continuedpressure thereon between the periphery of the eccentric 20 and the innerwall of said annular member so that in the rotation of said eccentric 20the annular member 22 surrounding the same will be sustained bya thinfilm of fluid, thus reducing the friction to a minimum. In a similarmanner, oppositely opposed grooves 36* are cut longitudinally of theinner walls of the bearings 18, thereby permitting the fluid enteringthe said grooves to thoroughly lubricate the shaft 17 revoluble therein.In order to take care of anyend thrust upon said shaft 17 a passage 37is provided in the periphery of the right hand bearing 18, this passage37 communicating with the radial passage 38 cut into the inner wall ofthe right hand end plate 19 so that any fluid entering the passage 36will be given an opportunity to be discharged therefrom into the inletportion of the piston chamber 12 in an. obvious manner.

By means of the various grooves provided in connection with theoperating parts of the device, all of said operating arts are thoroughlylubricated by the fluid being pumped, and as this fluid is forced intothe various grooves and passages under pressure the tendency is to causethe various workin parts to operate between thin films of said fluid,thus giving much more freedom of action than could possibly be securedwhere the solid bearing surfaces move in contact with one another.

It is believed that the operation and many advantages of a pump asherein shown and described will be fully apparent without furtherdescription.

Having thus described my invention, I claim:

1. In a device of the class described, the combination of a casingprovided with an inlet compartment, an outlet compartment, a cylindricalchamber between said compartments, and a cylindrical piston chamberlating member.

. grooves in the ed to contain fluid under pressure the grooves in onewall extending the full diameter of said member and in the other .wall alesser distance; a rotary shaft centrally disposed in said pistonchamber; an eccentrio thereon; adapted to contact at one point thereofwith the wall of said piston chamber; and asolid blade rigidly securedto said piston member and extending through the slot in said oscil- 2.In'a device of the class described, the combination of a casing providedwith a cylindrical piston chamber having an inlet passage and an outletpassage communicating therewith, said casing being also provided with. acylindrical recess interposed between said passages and having two wallthereof adapted to contain fluid under pressure, one of said groovesbeing open at both ends While the other is open at one end only; anoscillating slotted member in said recess having two grooves in theopposite walls of said slot, one of said grooves being open at both ends.while the other is open at one end only; and a rotary eccentric pistonin said piston chamber provided with a blade rigidly secured theretoextending through and accurately fitting the slot in said oscillatingmember.

3. In a device of the class described, the combination'of a casingprovided with a cylindrical piston chamber having inlet and outletpassages communicating therewith; a rotary eccentric piston in saidchamber provided with a radial blade rigidly secured thereto; and aslotted oscillating member through the slot of which said blade extends,said member having grooves in the bearing walls of its slot the one onthe discharge side extending to the piston chamber and the otherextending from the upper end of said slot to a point removed from saidpiston chamber.

4. In a device of the class described, the combination of acasingprovided with a cylindrical piston chamber having an inlet passageand an outlet passage communicating therewith, a rotary eccentric pistonin said piston chamber pro-vided with a blade interposed between saidinlet and outlet passages and preventing the flow of fluid from one tothe other; a rotary shaft for said pis-' ton; and a bearing for the endof said shaft provided with a groove extending longitudinally of itsinner wall and a groove communicating therewith extending longitudinallyof its periphery and communicating with the piston chamber.

an annular piston member' chamber;

5. In a device of the class described, the combination of a casingprovided with a cylindrical piston chamberhaving an inlet passage and anoutlet passage communicating therewith; a rotary sha t centrallydisposed in said piston chamber; an eccentric thereon; and an annularmember having a radial blade interposed between said passages, saidannular member being provided with an annular groove in its innercylindrical wall communicating with the discharge passage whereby fluidunder pressure may be admitted to the space and annular memberandconfined therein.

6. In a device'of the class described, the combination of acasing-provided with a cylindrical piston chamber having an inletpassage and an outlet passage communicating therewith, a fluidcompartment communicating withsaid outlet passage, and a cylindricalchamber interposed between said compartment and. piston chamber andcombetween said eccentric municatingwith both; an oscillating slottedmember in said cylindrical chamber; a rotary shaft centrally disposed 1nsaid piston an eccentric thereon; and an annular -member on saideccentric provided with a blade integral therewith extending through theslot in said oscillating member. 7. In a device of the class described,the combination of a casing provided with a cy lindrical piston chamberhaving an inlet 1 passage and an outlet-passage communicating therewith,a fluid compartment communicating with said outlet passage, and acylindrical chamber interposed between said compartment and pistonchamber, said chamber having an open groove in the wall thereof on thedischarge side extending to said piston chamber and a closed groove inthe opposite wall thereof extending from said fluid compartment; anoscillating slotted member in said cylindrical chamber having an openroove in the discharge side of its slot extending to said piston chamberand a closed groove in the opposite wall of said slot extending fromsaid fluid compartment; a rotary shaft centrally disposed in said pistonchamber; an. eccentric thereon; and an annular member on said eccentricprovided with a blade integral therewith ex= tending through the slot insaid oscillating member. 1

Signed by me at Boylston St, Boston. Mass, this 26thday of August, 1912.Y JUSTUS R. KINNEY. Witnesses: A

WALTER E. LOMBARD, NATHAN C. LOMBARD.

